Circuit breaker operating device



Dec. 22, 1931. A HALLER CIRCUIT BREAKER OPERATING DEV-ICE Filed' Oct.18, 1929 mwn qu U i fas 'tizio Patented Dec. 22, 1931 "ir-En isiA-ESARNOLD HALLER on BADEN; swrzEnLANn, rAssia-non,'.'roffinerInnernsni;'Lsiinvantl` BROWN 4isovnni a ein., cessioni-I,-sWrrzEni-innn, adorna-@Toen 'COMPANY orar;

vSVSTITZFRLAN D CIRCUIT :BREAKER OPERATING Annvnni i ApplicatonledOctober 18, '1929, Serial-No. l1:*00A92, and ixrGrmaily October27;*1'928.

This invention relates to improvementsin power circuit.breakerstandfpartlcularly, jto

drives for increasing the opening and :closing speed of suchcircuitrbreakers in whichthe contacts are Yimmersed in oil. n i. f

The speed at which an oil switch operate is one ofthe maj or factors indetermining the safe load for a given sizeof switch or in determiningthe.size of they switch to .be used for a given load. An increaseV of speedin operation of an oil switchzpermitsa decrease in the size ofthecontactsand aids Vinpre-V venting the continuance of. arcs betweenthe contacts' with the attendant `formation of gas bubbles and otherdeleterious results,

It is accordinglyamong the objectsoffthe present invention to provide adrive fortan oil switch which will increase the speed of operationthereby decreasing the length of time during which an are mayeXistbetween the contacts. l

Another object 0f the invention is to uprovide a drive for oil switchesin which a plurality of springs are arranged coaxially about theaxis-'of the loperating Vrod carry- Ving the movable contacts and inwhich the entire'drive is housed within a hood onthe gswitch-container.

`Objects and advantages, other than'those '3.530 above set forth, willbeapparent from the following vdescription and the 1 drawings,- in which:-v Figure l shows a partialcross-section of an oil switcli,takenapproximately on acentral vertical plane, in `which'the drive is shownin position l'just before contact-is made by the switch, and f Fig. 2 isavertical vcross-sectionV of .the drive after contact has been made inetheswitch.

- IFig. 8 isac'entral vertical cross-section showing the drive aftertheswitch has been disconnected, and

`Fig. Vlis afvertical cross-section showing operations. Y A

Referring more particularly to 4the drawings bycharactersfoffreferenceythe reference numeral 6 indicates a tankof theusualty'pe i Varranged to contain a 'uid,' such as oil, for

theform .of a. tube :1l extends downwardly Athe drive being preparedfora new cycle of 1 insulating and cooling pup'ossl tank and the other Vofwhich areV arranged :on the circumference of a circleconcentric .,w1th

theicentral opening; The outeropenings are formed to receive insulatingbushings l8,1015 'a "well `known character, to which areconnect- `edAthe fixed contacts 9. )The `central-'aperturethrough the coverplate 71isfarrangedsto be ,closedbyan open top hood 10il which. con-V tains thedriving mechanism', to be rlnore Y specifically describedhereinafteryandv Which;-

. #35 also formsaniextension ofLthe-airfspaceabove "the'oillevel Thehoodxis so fastened on'lthe top platee?" that thev drive may be:operated from any point. An :operating member in from the drivingzmechanisn'i` and 'controls movementofthe movable contacts L12. i L

VThe ,opening through the top zportion fof `the hood 10 is'closed:byacover Aplate llto` which,-issecure'd a .tubel7 havingia ,pin '.18(1115 i securedv within .thetilower end'v '.thereof; 4A spring 19 isfastened atene endY to the1pi11V G18 and is fastened at-the otherend toVa movable pin-20. which passes-ithro.ugh'-,fand is v guidedin'itsmovement by slots cut 'i'.nthewol tube 17. 'The pin 2O is securedto :thegin- I wardlyfi extending flangesof an innerrsleeve .23 which .isprovided with an extension .24:

for a purpose which will appear hereinafter. The operating tubecll is;lguided in its move- 19o lt-ending flanges of the inner sleeve 28 andtheoutwardly 'extending flanges offtheytube 11.

A portion Aof ,the flangeof tube'll-is formed "to extendthroughfa slotinthe innersleeve p ,Y

e5 vsleevez27 which has,secured,theretozafrack 'Y :andaflatch 31V. f

23and vacoinciding.slotformed in anouter.;

VTherackBOis arranged :toiengage if i ifpinion32;zoperablemanually;pneumatically,. electrically 'orhyd'raulicallyi`;'l whichk isfjsup-'-V .X100

B5 .ment bytube 17 vand isfflangedfoutwardly -finto contact with`.theinnersleeve QSA'to-form. a chamber arrangedto receive ahelicalvspring. 25 which is-,normally `:maintained aunderpressure betweenthedowerlinwardly ear-r-V 350' c ,f p23,- through the intermediateaction of the exA ported on a shaft extendingbeyondthe outer limits ofthe yoil switch container for the purpose of moving the several sleevesand tubes forming the switch drive in preparation for .5V connection ordisconnection of the contacts. The latch 31 is arranged to engagev anotch 34in1the inner sleeve 23 thereby mechanically coupling thesleeves. The latches 36, 37 are `secured on the top Yand side kportionsYof the lioodlulO,respectively, for the purpose'of en- 'g'agingrespectivelyv with the extension 2li of the inner sleeve and the`extension 26 on the operating tube 11 to retain the sleeves and..springs withinthe hood inpreparation for 15 the desired action. j

Figurefl oi' the drawings shows the drive* Vinv position Vprior tomakingVV Contact in the y switch. In Athis position, latch 31 engagesVnotch 34, which maintains outer sleeve 27V and o inner sleeve 23 insuch position that latch 36 'may' engageextension 24C to retain bothsleeves above the'low'er end or hood 10. The latch Y 37engagestheexteiision 26 on the operatingV tube 11 thereby maintainingspring 25 under 'y k25 compressionwhile spring 19 is maintained Vundertension. Contact may now be made between the fixed and movable contacts.byVV

-releasing `the latch 31 from notch 34: and then releasing latch 37 fromextension v26. Such f-factionI permits compression spring25 to ex-` :240tact with ,the iiXed contacts 9. The above described position of Y Fig.2. 1

'v V.It will :retained only by the action'of latch 36 on exythe drive isshown 'in .245 `tension 24 ofv inner sleeve 23 which forms one point ofattachment for the tension spring 19. Releasing latch V36 accordinglypermits ten- VVAsion spring 18 to'contract thereby forcingA Ymemb'erfforoperating the switch, a hood arranged-on the container for theswitchfaiil inner sleeve 23 downwardly.

The downward movement or inner sleeve panded compression spring 25,causes downward movement or the operating tube 11 so f thatrcontacts v12are separated'from contacts 9, thedrive :being inthe positionshown in#Fig 3. Y f- Y i j Y The positions of the drive above explained fshow'fthe connecting and' the :disconnecting Y Y action ofthespring'drive'which isvvnow iny its 1 ffullyreleasedpositionasshownin`Fig-4. It

:w-'gaged Vingnotchg34and. latch 37is caused to be seen thatv the entiredrive is now engage extension 26. Pinion 32 which has ro-V tated idly inthe downward movement of thev outer sleeve 27 which carries the rack 30,is now rotated in the reverse direction. Such reverse rotationof thepinion 32 causessleeves 7h. 1^ 23 and 27 tof be moved toward the top ofthe hood 10 Vuntil latch 36 mayl again engage extension 24. Suchactionor inner sleeve 23 cooperating with the fixed position of .operatingtube'll causes compression or 75 spring 25. Themovable.pin'"20,"toiwhich spring 19 is attached, being connected withinner sleeve 23, is'movedtoward the top, of the hood 10 andthe spring 19is againtensioned. The spring drive will lthen again 30 ybe 'in theposition shown in Fig. 1 in which it is again ready for reconnection `orthe switch. L i Y Although but one embodiment of the invention has beenillustrated and-described,s5 it will be understood that various otheremibodiments are possible and `that rvarious changes may be made thereinwithout departing from the spirit or the invention or the Y scopeof theappended claims. Y .Y ^v90 The invention claimed is: Y

1. In a drive -for oil switches lhavingra member for operating theswitch, a tube extending into and guiding the movement-of the operatingmember, aV plurality of sleeves/n.95

` coaxially arranged about the 'operating mein ber, a tensionspringwithinsuch tube, a coinpression spring between said sleeve aiidsaid operatingmember, means fortensionng and for compressingsaidsprings, and means forreleasing the energy stored in said springs.

' 2. InY a drive for oil switches having a member for. operating theswitch, a tube extending into and guiding the movement or the operatingmeinber,.a plurality or sleeves,105 l arranged about theoperatingniember, means for mechanically coupling said sleeves, a tenlsion spring within suchftubefa compression springbetween one of saidsleeves and said operating inember,`means Vfor tensioning ,andf l.110'

for compressing said springs, and means ford releasing the energy storedin said springs 3. 'In'. aV drivel for oil vswitches Vhaving. a

f-a'pluralityof sleeves arranged about the op* erating member, a springwithinsaidtube, a spring between saidY sleeve. and theoperi-.ggzo

.atingmemben meansconnectedwithsaid hood .for retainingsaidsleevestherein, means for stressing said springs, andk meansfforre-` leasing the energy stored infsaid springs.

ber for operating the switch, a.tixed.tube` guidingthe movement of theoperating mem- I ber, a plurality of springs c oacting tocause`rreciprocatingmotion of theoperating inem-k L hier 01.1@ 0f.smd-'Sprmss acting under. kv,emiso 4. In a ,drive for a switch havingainem-12b pression and another of said springs acting under tension, andmeans Vfor stressing saidy springs. Y

5. In a drive for a switch having a member for operating the switch, aiixed tube guiding the movementJ of the operating member, a plurality ofsprings coacting to cause reciprocating motion ofthe operating member,one of said springs acting under compression and another. of saidsprings acting under tension, a sleeve arranged about the operatingmember and forming a chamber therewith, said compression spring beingretained within thel chamber, and means for stressing said springs.

6. In a drive for a switch having a member for operating the switch, afixed tube guiding the movement of the operating member, a. plurality ofsprings coacting to cause reciprocating motion of the operating mem--ber, one of said springs acting under Compression and another ofsaidsprings acting under tension, said tension spring being retainedwithin said tube and secured thereto at one end, a sleeve arranged aboutthe operating member and engaging therewith, one end of said springbeing secured to said sleeve, and means for stressing said springs.

V7. In a device for operating circuit breakers having a movable contactcarrying member, a fixed tube extending into' and guiding the movementof the contact member, a plurality of sleeves arranged about said tube,a compression spring within said sleeves, a tension spring within saidtube, said springs being capable of moving the contact member inopposite directions, and means for stressing said springs.

In testimony whereof I have hereunto sub#V scribed my name this 4th dayof October, A. D. 1929.

g A RNOLD I-IALLER.

